Parallel Peripheral Interface

The Parallel Peripheral Interface (PPI) is a peripheral found on the Blackfin embedded processor. The PPI is a half-duplex, bi-directional port that is designed to connect directly to LCDs, CMOS sensors, CCDs, video encoders (video DACs), video decoders (video ADCs) or any generic high speed, parallel device.^[1]

The width of the PPI is programmable and can be set between 8 and 16 bits in 1-bit increments. The latest Blackfin family (BF54x) also features an 18/24-bit PPI for direct connection to RGB LCD panels.

The PPI can run from 0 MHz up to 66 MHz.

The PPI has a dedicated clock pin, three multiplexed frame sync pins, and between 16 and 24 data pins.^[2]

References

1. "PPI: Parallel Peripheral Interface [Analog Devices Wiki]". wiki.analog.com. Retrieved 2021-10-01.
2. Y, Roshni (2019-07-04). "What is 8255 Programmable Peripheral Interface (PPI)? Definition, Architecture, Pin Diagram and Modes of Operation of 8255". Electronics Desk. Retrieved 2021-10-01.

http://blackfin.uclinux.org/doku.php?id=ppi